when using cc cleaner

and i click on anilize it goes to 96% and hangs never finnishes

im useing the newset version

dell P4 3.0 512 DDR2 80 gig h/d 128 pci express video

dvdcdr/r/w burner

ff2.0

ie7

xp home

sp 2 fully updated and virus/spyware free

avg anti virus and firewall